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  Copyright (c) 2017-2018 Jean-Marc VIGLINO,
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  <title>ol-ext: Search feature control</title>
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  <meta name="description" content="Control to add a grid reference to a map." />
  <meta name="keywords" content="ol3, control, search, vector, feature" />

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  <a href="https://github.com/Viglino/ol-ext" class="icss-github-corner"><i></i></a>

  <a href="../../index.html">
    <h1>ol-ext: Search feature control</h1>
  </a>

  <div class="info">
    <i>ol.control.SearchFeature</i> is a control to search features in a source.
    <ul>
      <li>
        You have to define a <i>ol.source.Vector</i> to search in.
      </li>
      <li>
        You can define a <i>property</i> that will be used to search in or define a getTitle/getSearchString function.
      </li>
      <li>
        You can define a <i>getTitle</i> to get the string that will be displayed in the menu
      </li>
      <li>
        You can define a <i>getSearchString</i> function that will take a feature and
        return a string to search in.
      </li>
    </ul>
    <br/>
    <i>ol.control.SearchFeature</i> use the <a href="map.control.search.html">ol.control.Search</a> control.
  </div>

  <!-- DIV pour la carte -->
  <div id="map" style="width:600px; height:400px;"></div>

  <div class="options">
    <h2>Options:</h2>
    <ul>
      <li>
        maxInputs: <input type="number" onchange="search.set('maxItems', Number(this.value));" style="width:3em;" value="10" />
      </li>
      <li>
        search property:
        <select onchange="search.set('property',this.value); search.search();">
          <option value="commune">commune</option>
          <option value="region">region</option>
          <option value="text">text</option>
        </select>
      </li>
    </ul>
    <i>Use the search control to start a new search.</i>
  </div>
  
  <script type="text/javascript">
  // Layers
  var layers = [
    new ol.layer.Tile({
      title:'terrain-background',
      source: new ol.source.StadiaMaps({ layer: 'stamen_terrain' })
    })
  ]

  // The map
  var map = new ol.Map({
    target: 'map',
    view: new ol.View({
      zoom: 5,
      center: [166326, 5992663]
    }),
    layers: layers
  });

  // GeoJSON layer
  var vectorSource = new ol.source.Vector({
    url: '../data/fond_guerre.geojson',
    projection: 'EPSG:3857',
    format: new ol.format.GeoJSON(),
    attributions: [ "&copy; <a href='https://data.culture.gouv.fr/explore/dataset/fonds-de-la-guerre-14-18-extrait-de-la-base-memoire'>data.culture.gouv.fr</a>" ],
    logo:"https://www.data.gouv.fr/s/avatars/37/e56718abd4465985ddde68b33be1ef.jpg" 
  });

  map.addLayer(new ol.layer.Vector({
    name: 'Fonds de guerre 14-18',
    source: vectorSource,
    style: new ol.style.Style({ image: new ol.style.Icon({ src:"../data/camera.png", scale: 0.8 }) })
  }));

  // Control Select 
  var select = new ol.interaction.Select({});
  map.addInteraction(select);

  // Set the control grid reference
  var search = new ol.control.SearchFeature({
    //target: $(".options").get(0),
    source: vectorSource,
    property: $(".options select").val(),
    sort: function(f1,f2) {
      if (search.getSearchString(f1) < search.getSearchString(f2)) return -1;
      if (search.getSearchString(f1) > search.getSearchString(f2)) return 1;
      return 0;
    }
  });
  map.addControl (search);

  // Select feature when click on the reference index
  search.on('select', function(e) {
    select.getFeatures().clear();
    select.getFeatures().push (e.search);
    var p = e.search.getGeometry().getFirstCoordinate();
    map.getView().animate({ center:p });
  });

  </script>
  
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